/*
 * Copyright 2019 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.kie.workbench.common.stunner.core.client.command;

import java.util.function.Supplier;

import javax.annotation.PreDestroy;
import javax.enterprise.context.Dependent;
import javax.enterprise.event.Observes;

import org.kie.workbench.common.stunner.core.client.canvas.event.mouse.CanvasMouseDownEvent;
import org.kie.workbench.common.stunner.core.client.canvas.event.mouse.CanvasMouseUpEvent;

@Dependent
public class MouseRequestLifecycle implements CommandRequestLifecycle {

    private Supplier<CommandRequestLifecycle> target;

    public void listen(Supplier<CommandRequestLifecycle> target) {
        this.target = target;
    }

    @Override
    public void start() {
        getTarget().start();
    }

    @Override
    public void rollback() {
        getTarget().rollback();
    }

    @Override
    public void complete() {
        getTarget().complete();
    }

    @PreDestroy
    public void destroy() {
        target = null;
    }

    void onMouseDown(final @Observes CanvasMouseDownEvent event) {
        start();
    }

    void onMouseUp(final @Observes CanvasMouseUpEvent event) {
        complete();
    }

    CommandRequestLifecycle getTarget() {
        return target.get();
    }
}
